Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22a600240d32cac…

MALICIOUS

PDF

76.4 KB Created: 2021-09-17 22:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3b73fe7f89e5614854ee9cae9b179649 SHA-1: bf6711407233e395b928b1a2fc2d941be1dfc087 SHA-256: b22a600240d32cac05b97778a78189490b17fbaaca90f19fd0fd71f021d470c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://medvor.ru/uplcv?utm_term=munna+bhai+mbbs+full+movie+download+filmywap', are likely used to redirect users to malicious content. The document's structure and the presence of numerous external links suggest it's designed to exploit user curiosity or trick them into visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://medvor.ru/uplcv?utm_term=munna+bhai+mbbs+full+movie+download+filmywap PDF link annotation
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/sejigirejokezelibuwunori.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/dimofaresan.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614087170ac43---31749898099.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/36182402884.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/pakimo.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/loxufapepegag.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/24786189346.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/74534068444.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bc5b15780---sefejasimewugelejid.pdfIn PDF document text
    • https://roshnaai.com/ckfinder/userfiles/files/63160195088.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613eddb9ae624---15145854899.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/77103505159.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/lojabim.pdfIn PDF document text
    • http://strandedtattoo.info/file/5479827124.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613576abd635f---bemelumofabisew.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/livapokad.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/detemaxidetekekam.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161362ea54ddb9---48989091707.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/newezele.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/52293266767.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109172005123385.pdfIn PDF document text
    • http://tochalco.com/uploads/files/gewuvudedejumipotasebina.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/wipodubefor.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f804cc10f9---65634152772.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/58675633371.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3D 17528 bytes
SHA-256: 9bbd13b880463c1e144e5c693ba2bb841e68a5be1fa1df9a4961cf45d7c21a1d
font_02_sfnt_off00010a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9D 11064 bytes
SHA-256: 2046d975e2efc11869f3850c5ce4d1e2920b80247b7b0ad8dea42fc5aa210546

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